Model: 7SR120 Argus

Function: Directional overcurrent & earth fault protection

Inputs: 1/4xI and 3xV

Power Supply: Universal AC/DC

Communication: USB (front), RS485 (rear) – MODBUS RTU / IEC 60870-5-103 / DNP3.0

Display: LCD screen with menu navigation

Mounting: Non-draw-out, size 4 case

Protection Functions:

Undercurrent (37) • Broken Conductor (46BC) • Negative Phase Sequence Overcurrent (46NPS) • Thermal Overload (49) • Overcurrent (50, 51) • Earth Fault (50G, 50N, 50SEF, 51G, 51N, 51SEF) • Directional OC & EF (67) • High Impedance REF (64H) • Under/Over Voltage (27/59) • Negative Phase Sequence Voltage (47) • Voltage Controlled Overcurrent (51V) • Neutral Voltage Displacement (59N)

Supervision Functions:

CT Supervision (60CTS) • VT Supervision (60VTS) • Trip & Close Circuit Supervision (74T/CCS) • Inrush Detector (81HBL2) • Circuit Breaker Fail (50BF)

Control Functions:

Auto Reclose (79)

Monitoring Functions:

Phase & Earth Currents • Line Voltages • Apparent, Real & Reactive Power • Power Factor • W Hr & VAr Hr (Forward/Reverse) • PPS/NPS/ZPS Voltages and Currents • Historical Demand Records

Main Features:

Cold Load Settings • Four Setting Groups • 2-Level Password Protection • Programmable Logic • Self Monitoring • CB Trip Counter • Fault/Event/Waveform Records